Under defined namespace, rules, props and metadata nodes persist in YAML. Modifying nodes can dynamically refresh configurations.
nodes persist the runtime node of database access object, to distinguish different database access instances.
sys_data persist data records in system tables.
namespace
├──rules # Global rule configuration
├──props # Properties configuration
├──metadata # Metadata configuration
├ ├──${databaseName} # Logic database name
├ ├ ├──schemas # Schema list
├ ├ ├ ├──${schemaName} # Logic schema name
├ ├ ├ ├ ├──tables # Table configuration
├ ├ ├ ├ ├ ├──${tableName}
├ ├ ├ ├ ├ ├──...
├ ├ ├ ├ ├──views # View configuration
├ ├ ├ ├ ├ ├──${viewName}
├ ├ ├ ├ ├ ├──...
├ ├ ├ ├──...
├ ├ ├──versions # Metadata version list
├ ├ ├ ├──${versionNumber} # Metadata version
├ ├ ├ ├ ├──data_sources # Data source configuration
├ ├ ├ ├ ├──rules # Rule configuration
├ ├ ├ ├──...
├ ├ ├──active_version # Active metadata version
├ ├──...
├──nodes
├ ├──compute_nodes
├ ├ ├──online
├ ├ ├ ├──proxy
├ ├ ├ ├ ├──UUID # Proxy instance identifier
├ ├ ├ ├ ├──....
├ ├ ├ ├──jdbc
├ ├ ├ ├ ├──UUID # JDBC instance identifier
├ ├ ├ ├ ├──....
├ ├ ├──status
├ ├ ├ ├──UUID
├ ├ ├ ├──....
├ ├ ├──worker_id
├ ├ ├ ├──UUID
├ ├ ├ ├──....
├ ├ ├──process_trigger
├ ├ ├ ├──process_list_id:UUID
├ ├ ├ ├──....
├ ├ ├──labels
├ ├ ├ ├──UUID
├ ├ ├ ├──....
├ ├──storage_nodes
├ ├ ├──${databaseName.groupName.ds}
├ ├ ├──${databaseName.groupName.ds}
├──sys_data
├ ├──shardingsphere
├ ├ ├──schemas
├ ├ ├ ├──shardingsphere
├ ├ ├ ├ ├──tables # system tables
├ ├ ├ ├ ├ ├──sharding_table_statistics # sharding statistics table
├ ├ ├ ├ ├ ├ ├──8a2dcb0d97c3d86ef77b3d4651a1d7d0 # md5
├ ├ ├ ├ ├ ├──cluster_information # cluster information table
These are the global rule configurations, which can include transaction configuration, SQL parser configuration, etc.
- !TRANSACTION
defaultType: XA
providerType: Atomikos
- !SQL_PARSER
sqlCommentParseEnabled: true
These are the properties configuration. Please refer to the Configuration Manual for more details.
kernel-executor-size: 20
sql-show: true
A collection of multiple database connection pools, whose properties (e.g. DBCP, C3P0, Druid and HikariCP) are configured by the users.
ds_0:
initializationFailTimeout: 1
validationTimeout: 5000
maxLifetime: 1800000
leakDetectionThreshold: 0
minimumIdle: 1
password: root
idleTimeout: 60000
jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds_0?serverTimezone=UTC&useSSL=false
dataSourceClassName: com.zaxxer.hikari.HikariDataSource
maximumPoolSize: 50
connectionTimeout: 30000
username: root
poolName: HikariPool-1
ds_1:
initializationFailTimeout: 1
validationTimeout: 5000
maxLifetime: 1800000
leakDetectionThreshold: 0
minimumIdle: 1
password: root
idleTimeout: 60000
jdbcUrl: jdbc:mysql://127.0.0.1:3306/ds_1?serverTimezone=UTC&useSSL=false
dataSourceClassName: com.zaxxer.hikari.HikariDataSource
maximumPoolSize: 50
connectionTimeout: 30000
username: root
poolName: HikariPool-2
Rule configurations, including sharding, read/write splitting, data encryption, and shadow DB configurations.
- !SHARDING
xxx
- !READWRITE_SPLITTING
xxx
- !ENCRYPT
xxx
Use separate node storage for each table, dynamic modification of metadata content is not supported currently.
name: t_order # Table name
columns: # Columns
id: # Column name
caseSensitive: false
dataType: 0
generated: false
name: id
primaryKey: trues
order_id:
caseSensitive: false
dataType: 0
generated: false
name: order_id
primaryKey: false
indexs: # Index
t_user_order_id_index: # Index name
name: t_user_order_id_index
It includes running instance information of database access object, with sub-nodes as the identifiers of the currently running instance, which is automatically generated at each startup using UUID.
The identifiers are temporary nodes, which are registered when instances are online and cleared when instances are offline. The registry center monitors the change of those nodes to govern the database access of running instances and other things.
It can orchestrate replica database, and delete or disable data dynamically.